There are two optional video sync boards which can be used to synchronise the outputs of the RB-SC2 to a 48kHz sample rate: the RB-SYA and the RB-SYD. The Sonifex RB-SYA Analogue Video Sync Board will accept a composite signal of NTSC (525), PAL (625) & SECAM (625) signals covered by SMPTE-170-M (NTSC) and ITU-R BT.470-6 (PAL & SECAM)